Which condition is categorized as an acyanotic congenital heart defect?

Which condition is categorized as an acyanotic congenital heart defect?

• A. Coarctation of the aorta
• B. Transposition of the great arteries
• C. Truncus arteriosus
• D. Hypoplastic left heart syndrome

Answer: (A)

Acyanotic defects involve situations where the systemic blood remains relatively well oxygenated because there isn’t right-to-left mixing or severe loss of systemic flow. Coarctation of the aorta is an obstructive lesion that lowers blood flow to the body but doesn’t inherently produce desaturated blood in the systemic circulation, so it’s classified as acyanotic. The other conditions listed involve mixing or reliance on shunts that reduce the oxygen content reaching the body, leading to cyanosis: transposition of the great arteries creates parallel circulations that require mixing to survive; truncus arteriosus allows mixing of oxygenated and deoxygenated blood in a common outflow; hypoplastic left heart syndrome severely limits systemic flow and depends on ductal or shunt flow for oxygen delivery. So, the acyanotic option is coarctation of the aorta.

Acyanotic defects involve situations where the systemic blood remains relatively well oxygenated because there isn’t right-to-left mixing or severe loss of systemic flow. Coarctation of the aorta is an obstructive lesion that lowers blood flow to the body but doesn’t inherently produce desaturated blood in the systemic circulation, so it’s classified as acyanotic. The other conditions listed involve mixing or reliance on shunts that reduce the oxygen content reaching the body, leading to cyanosis: transposition of the great arteries creates parallel circulations that require mixing to survive; truncus arteriosus allows mixing of oxygenated and deoxygenated blood in a common outflow; hypoplastic left heart syndrome severely limits systemic flow and depends on ductal or shunt flow for oxygen delivery. So, the acyanotic option is coarctation of the aorta.